Power shovel



April 1o, 192s.

E. E. PETERsoN POWER SHOVEL Filed Oct. 1'7. 1924 3 lSheets-Sheet l E. E.PETERSON POWER SHOVEL Filed Oot.1'7. 1924 3 Sheets-Sheet 2 April 1o,192s. 1,6@5378 Q INVENTOR EiwesEPeens'an im l A ORNE? 1 gj FA* VAB w VRApril 10, 1928. v 1,665,378 Y E. E. PETERSON POWER SHOVEL Ffiled Oct.17. 1924 3 Sheets-Sheet 3 gmc/ufo@ vate a drift orother tunnel.

p Patented Apr. 1Q, 1928.

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POWER sHovnn.

' Appnmanmil filed october 17, v1924. serialno. 744,146.

This invention relates Vto power shovels, particularly, although notexclusively, adaptedI oruse in underground mining to excashovels: havethe further disadvantage'rof'- being' slowin operation 'because of thetime. required/,to 'tur-nthe boom upon its horizontally 'revolvingsupport in emptying. p a load from the bucket. f Y

It isV my object to provide a novel power shovel `Awhich can beoperatedin an unusually small space-to rapidly'eXca-vate and? deposit excavatedmaterial in a suitable conveyor.

Another object is to simplify and render the operation of a shovel ofthis kind'more K positive by providing a'chute, integrali or connectedwith the bucket Mpro'per, v so J arranged4 that by merelyi tilting thechute and bucket the loadmay be hoisted and depositi-` ed in a.conveyance receptacle. f

A further object is to provide a novel and efficient shovel adapted'togoperate upon thef 'Iruthe accompanying.'

' f Vroof as well-as'upon the frontv orend and sides'of a restricted.underground vpassagey This inventional'so includescertain other l novelfeatures of construction which will bef A; more fully pointed" out intheqrfollowing/ 4o specification Vand claims.

drawings: which:

illustrate the best form of: my AVdevicefat.

present known tome, Figure 1 is a side elevation of my improvedy powershovel; Fig; 2A isla plan View ofthe same; Fig.l Sisal' transversesection throughf the vboomfinemf bers and chute, showingftheswivelljoint between saidmembers and chute" and' Vtheg. l cylinder forimparting longitudinalmoye-l mentto thel scoop and chute;y fis? aysection through one 'of the boom Y`members;

and brace 4there'to'r taken on the line 4:4401?" Fig. 1;;Fig. y5 isadetail, perspective view 'of' one 'ofthe brace' cateh'es'and Fig. 6 isYader' tail,\side elevation, of the scoop, chute vand operatingmechanism, partially in section. p

Referring tothe drawings, I have used the numeral'dto indicateasuitablecarfor carryingl mydevice and Z is a housing 'adapt-V ed to enclosethepowerplant which maybe of anyone tot al number 'of wellknown types.

]ivote':d in a large bearing 8 near kone end.v

of the car ,t3-is a turnltable'f) provided on its. base with al'a'rgearcuate rack 10.whichvmay be operated by a pinion 11 Ito turn the table9. Upon the forward' edgey orv the tablet);

pivotedjin bearings 12a, is a' pair of boom.

members 12, between which, a jscoop 13 andv anintegral-chute 15aremounted upon. later, ally projecting studsr` The scoopll is closed atits normally forward end and provided with the usualteeth ladaptedftofacilitate drivingsaidendfinto material to be.

excavated. i

#As clearly shown inr Fig-s. 1 chute-.15 extends backward incontinuation: of: a scoopll and is openat, its rearwardend '17 tof allow'excavatedfvmaterial to read? -il'yslide out-.ofthe chute whenQthe chuteandv scoop are tilted, as hereinafter described;

EXtendingalongthe bottom-otv the chutelf)l is .af pair of laterallyprojecting .parallel flanges 18 *adaptedv to -slidably engage guideflanges, 19.v formed on a bucket support` 2O (Fig. 3)'.V Thissupport20isv` provided with laterally projecting hubs L21, which main.

tain the chute 15in proper spaced relation' l between-the boom.ymembersp12@ Tooperate.v y vthe-chuteupontherguide flanges19, a bracket22 (Fig. v1)is' rigidly;l secured to the bottonr ot the Vchute andisjoined 'a rodv 23 with v a piston within ai cylinder 24, saidcylinder'f.

beingrrigidly held inthe supportg20. The

. pistonwitliin; this 'cylinderl 24yis adapted to;

be given reciprocating movement. in the usual l manner? by a, suitablefluid under pressurev which-may be deliveredto opposite'lgendsof. i the*cylinder through vpipes 24a 'andr 24;?, Y

respectively.

' *T0 tilt the SCOOP and chute upon the beam,

a pair ogtcables' 25 are'secured at'their fora ward; ends toa transversebar i 26. These cabl'esfa-repasse'dfover apair of sheaves27; on?" i r iI theupper 'en'dss of theI boom members 12 andv entend-backward intothei housing '7ffwheref they may be simultaneously,woundupfmor unwoundlfromf asuitable {windlass' or other poweredrivenf mechanisma braces/281for the broom; members 12 are pivotally connected to the turn tablev 9`at `their normally Y Y rearward extremities, and the-forward ends ofthese braces are slidable vinV slots in latertheside of the chute 15.

ally projecting iianges 30 on the members 1'2. A head 31 on each of thebraces 28 is adapted to engage the ange 30 to limit forward tilting ofthe boom members 12, while back-V Ward movement of said members islimited by a stop lug 32 on each of the braces 28.

ATo prevent the pull upon the cables 2,5y during `the hoistingoperationfrom drawing A the boom members 12 back against the stopv lugs32, I provide a catch 33 opposite-each of the heads31. Each ofthecatches 33'is swivele'd upon a pin34a in one of the members 12 and hascrank arms 34 and 35. A ,1ug36' on the armi-34 is normally Vheld inengagement-with the head 13 by a Vspring 37 secured at one end to thearm- Yand fixed at its other end upon a small bracket 38 on themember12. Projecting through an arcu-` vate'slot- 39 in the memberr12 isa pin 40`on the arm 35, which is adapted to be struck to actuatethe.catch'by a rigid projection 41 on A support 42 for a receptacle l43 ismounted upon'the table 9. This receptacle 43 is open at its -top toreceive excavated material from `the chute15. To facilitate use of therecepf tacle 43 j with an overhead conveyor of the `type employed inunder ground mines, I provider means for raising said receptacle andVits support/42 from its osition wherejit is filled by the chute 15'(t e.dotted line position,'Fig.1),to an elevated position (shown in fulllines in 1)*vwherefit may be con- Y veniently attached to a hook orother member 5,0`extending into the housing.A

berof such a conveyor. Thus, the support 42 is carried upon pairs ofarms 44 and 45 which are pivoted in suitable'bearings 46 on the table 9and severally adapted to lo'eactuv ated'byV cranks 47 and48. Thesecranks47j and 48 lare joined by`links'49 and adapted` *to be swung inarcs'by a power-drivenmem- 1 x Operation., ,j I j Operation, the scoop13 may beez-{tendedforward by r4paying out the cables 25 and'smultaneouslyadmitting fluid pressure behina fi-harpist@ 'inthezcylinder 24;. TheV -cab1es25may be retracted to tiltthescoopA V4andchute'upon the studs 114. ,During the f yoperation of picking up la loadand hoisting it,"the lugs v36f^lhold the heads 31 adjacent'tothe'fforward surfaces ofthe Hanges 30, soVV thatthebraces 28 maintainthe boom'niemj Y bers 12 in the full line position'A shown :in toretracted within ythe* housing 7 to swingthe Fig. 1, To empty a load,the. cables 2,5 are scoop upward Vand backward upon the studs 14. As thechute 15 approaches its dotted vlineposition shown in Fig. 1, theprojections .$1.41 on thesides ofsaid chute, strike the` pins 40 tothrow the lugs 36 out of engagement with the head 31, thus allowingthe'boom lmembers. 12 to swing backwardagainst the Vstop lugs 32. This,as will be readily under-` stood, causes excavated materialin the scoop13 to pass backward by gravity through the chute15 and out at the open'end 17 thereof.

The receptacle 43, which has been previouslyV lowered to 'its dottedline position (Fig. 1) f Y "5 i ing 7, now catches the excavatedVmaterial as Y by extending the member from the hous- Vit falls from.the chute -17. By repeating the f above described operation, loads maybe de` livered from the scoop 13 to the ,receptacle 43 until the latteris filled. The member 50 is finally lretracted intoY vthe housing' l7 toraise the support 42 and receptacle 43 tothe full line position shown inFig.V 1', wheresaidreceptacle may be conveniently attached tol Y ,sa i

an overheadvconveyor for vdisposal of the excavated material.

YBy means of the pinion 11 and rack 10,

lthe turn table 9` may be swung horizontally inthe bearing 8 to reachwith the scoop 13 all desired parts of the ends, sides and roof Y of thetunnel. It will be noted thatV when the receptacle -43 is loweredVit islocated directly above the'axis of rotation of the table 9, so that saidyreceptacle is maintained in position to receive lexcavated mate-l rialfrom .the end 17 of the ychute l5irre- Yso spective of the angularposition of the "table "9. Obviously, the scoop 13 maybe extendedupward, as indicated in dotted lines of F ig,

1, to reach the roof of the tunnel when material removed therefrom willimmediately pass by V{grail/ity dQWn'the chute 15 into the receptacle43. Y f- Havingrdescribed my-inventionlwhatfl i i claimas newand tersPatent is: ,Y n V- f Y 1. In a power shoveladapted ,forfjtunnel-v ingViny restricted space, a turntable, a Vboom vdesire to protect by VLetendof saidboom tooperate .upon the roof andV a :receptaclearrangedtolreceive exca-l Y I `vated material vdirectly'ffromv said chute,

whensaid scoop iselevated. j

g2. Injapower shovel adapte dfor tunnel-fV ing, a carriage, aboom'pivoted upon a horilzontal axis on .said carriage, a-scoop and Ychute communicating with's'aid scoop,ipivot l edupon's'aid boomfupon ahorizontal, axis located aA substantial .distance above said carrige,sai-d scoop being adapted, to bej projected upward abovethe upper.en'd'of said boomY to remove material fromthe roof cfa 11,5 g Y.ofajtunnel, means for extendingand ,118-, j' .Y tractmg saidscoop andchute on said boom,"l means for ltlltlng` said chute. on' said boomvated to discharge itscontents through said nce-meas.

tunne "Lmea'nsfor extend-in andretractinfr 7V D said scoop and chuteonffsaidboom, `meansV forl tilting saidf chute? toV raise l 'saidl scoopon said-"boom, meansl for permitting backward pivoting ofsa1djboombn'sa1d carriage to.`

emptyvv material fromy saidl scoop. andia jre- 'ceptacl'eJ arrangedk onrs aidcarriagefto 1receive excavated lmate'rial from`| said chute when,saidnscoop is elevated. i

3: Inaf power-shovel adapted for tunneling in restricted space,racarriage, a pair of boom members tiltably supported on said carriage andprojecting obliquely forward therefrom, a scoop and an integralchuteswiveled between said boom members, said scoop being adapted to extendupward above the upper end of said boom members to operate upon the roofofka` tunnel, means for rigidly holding said yboom members inpredetermined, forwardly extended, posi-- tion during the operation ofsaid scoop, means for allowing rearward swinging of said boommembers-when said scoop is elechute and means for extending andretracting said chute between said boom members comprising a cylinderand piston mounted on the bottom of said chute and adapted to beoperated by fluid under pressure.

4. In a ypower shovel a carriage, a boom tiltably mounted near one endofsaid car- `riage, in oblique, forwardly projecting position, a scooppivoted on said boom,a chute communicating with said scoop, means forextending and retracting said scoop o-n said boom, means for elevatingsaid scoop to allow excavated material to pass by gravity backwardthrough said chute, anda bracel and catch arranged to maintain said boomin forwardly extended position during Yhoisting and for allowing saidboom to swing backward upon said carriage to empty excavated materialthrough said chute.

5. In a. power shovel, a turn table, a boom tiltably mounted near oneend of said table in oblique, forwardly projecting position, a

Vscoop and a chute communicating with said,

scoop pivoted upon said boom, means extending and rotating said scoopand chute on isaid boom, means for elevating saidscoop to allowexcavated material to pass by gravity backward through sai-d chute,'andabrace and catch arranged to maintain said boom `in forwardly extendedposition during hoisting and `for allowing said boom to swingbackwardupon said carriage to empty excavated material through saidchute,

6. In a power shovel, a carriage, a boom tiltably mounted near one endofy said carriage, means for maintaining said boomin v oblique,forwardly extended position, a

scoop pivoted von vsaid boom, a chute communicating with said scoop,mea-ns for slidably extending and retracting said scoop on said boom,means for elevating said scoop to allow excavated materialto pass by;

ity. backward,` through said. chute andi a catch forl allowing saidrboomto; swing.' backward; upon saidcarriageto empty' excavated materialthrough said chute. f i

7. In 'ag power shovelV adapted fon rtunneling inf-restrictedspace, a;vcarriage, apair of boom members tiltably; supported onsadq 'apacarriage. andiprojectin .'nobliquelyf. forwaridajl therefrom, a; scoopan n an integralgohutga-H swiveled between said boom members, said scoopbeing adapted to extend upward above the upperend of said boom membersto op- ,erate uponftheroof ofa tunnel, means for positively holding saidboom members in predetermined, forwardly extended position an integralchute to operate upon the roof of a tunnel, means for positively holdingsaid boom members tion during the operation of said scoop, said scoopand chute being arranged to be Vele,-y vated to discharge excavatedmaterial through said chute and means for extending and retracting saidchute between said boom members comprising a cylinder and piston mountedon the bottom of said chute and adapted to be operated by fluidunderpres-` sure.

vin predetermined, forwardly extended posi- 9. In a power shovel, a turntable, a

of boom members pivoted to swing vertically upon the normally forwardperiphery of said table, a pair of rigid'braces pivoted upon said tableat their normally rearward ends and .slidably attached to said boomvmembers at their forward ends, a scoop and chut-e pivoted to swingyvertically between said boom members, a receptacle carried by to allowexcavated material to pass by grav'- ity through said chute into saidreceptacle,

'and' catches for said braces on said boom [said table, means forelevating said scoop..

members disposedto be actuatedwto allow rearwardswinging ,of said boomwhen said bucket is elevated.

adapted for use inktunnels and an overhead 10. The combinationwith apower shovelV conveyor of a turntable, a boomtiltably i' 'carriedy uponsaid table., a scoop and chuteV pivoted upon said boom, meansvforelevatinga V saidlscoop too empty lexcavatedmaterial through saidchutea receptacle disposed Vatedto bring said receptacle into proximityWith said conveyor. i

` l1. Thecornbinationwith aipowerhovel adapted for use in' tunnels and aconveyor,

of a carriage, a boom tiltably mounted upony said carriage, la Scoop andohutepivoted f upon saidv boom', means for elevatingV said scoop toVempty excavated material through4 said chute, a receptacle disposed onsaid oar-V riage to receive excavated material vfrom Y said chute, and asupport forislad receptacle arranged tobeactuated to bring saidy receptaole into proximity with said"oonveyor.l

In testimony whereof, I have hereunto Y Signed my name to thisspecilioation.

VERNESTE KPETERSYON l

